Patent US3802008A successfully refreshed from Google Patents.
US3802008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimmer propulsion device
Assignee: Innerspace Corp
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Filing: 1971-05-10
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Granted: 1974-04-09
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Expires: 1991-05-10
Abstract
Abstract A novel and improved swimmer propulsion device of the type having a resiliently positioned fin which is adapted to oscillate and thereby develop fluid flow.
Inventors
- 👤 C Gongwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:31
CPC Classifications
A; A63; A63B; A63B35/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: at least one blade member forming said fin means and being positioned transverse of an axis at said power transfer means; said blade member having a forward lead edge and a back trailing edge; and means to reverse the relative positions of said lead edge and said trailing edge with respect to said engaging means.
Claim 2
Independent Claim
131 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: at least one blade member forming said fin means and being positioned transverse of an axis at said power transfer means; said blade member having a forward lead edge and a back trailing edge; and means to reverse the relative positions of said lead edge and said trailing edge with respect to said engaging means.
Claim 3
Independent Claim
119 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: at least one blade member forming said fin means and being positioned transverse of the axis of said power transfer means; said blade member having a forward lead edge; and said lead edge having a roughened portion to prevent separation of flow thereacross.
Claim 4
Independent Claim
119 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: at least one blade member forming said fin means and being positioned transverse of the axis of said power transfer means; said blade member having a forward lead edge; and said lead edge having a roughened portion to prevent separation of flow thereacross.
Claim 5
Dependent Claim
22 words
The device of claim 2, wherein a plurality of scribe marks extending longitudinally along said forward lead edge form said roughened portion.
Claim 6
Independent Claim
162 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, stabilizing means adapted to maintain the swimmer''s body in a level attitude, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: a pair of mirror image component members forming said stabilizing means and being positioned symmetric about said power transfer means and extending transversely thereof during operation; connecting means connecting said component members to said power transfer means; and said component members being collapsible about said connecting means whereby said component members can be moved to a substantially parallel position with respect to said power transfer means and thereby provide a substantially compact transportable unit.
Claim 7
Independent Claim
162 words
A device for providing for propulsion to utilize a swimmer''s power of the type having engaging means adapted for engagement with the lower leg portions of a swimmer, stabilizing means adapted to maintain the swimmer''s body in a level attitude, power transfer means attached to and operative with said engaging means, fin means pivotally attached to said power transfer means and positioned substantially opposite the center of gravity of the swimmer''s body, and resilient means connecting said fin means to said power transfer means, wherein the improvement comprises: a pair of mirror image component members forming said stabilizing means and being positioned symmetric about said power transfer means and extending transversely thereof during operation; connecting means connecting said component members to said power transfer means; and said component members being collapsible about said connecting means whereby said component members can be moved to a substantially parallel position with respect to said power transfer means and thereby provide a substantially compact transportable unit.
Claim 8
Dependent Claim
22 words
The device of claim 4, wherein said fin means includes a roughened forward edge portion to prevent separation of the flow thereacross.
Claim 9
Dependent Claim
29 words
The device of claim 4, wherein reversing means are provided to hold said fin means in a reversed position and thereby effect a change in the direction of propulsion.
Claim 10
Dependent Claim
21 words
The device of claim 4, wherein said connecting means includes a mounting bracket and said component members are pivotally secured thereto.
Claim 11
Dependent Claim
47 words
The device of claim 7, wherein said mounting bracket includes a pair of leaf members extending outwardly from each side thereof, said component members being pivotally connected to said leaf members and maintained at a forward incline with respect to an axis of said power transfer means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |